When he’s not waxing poetic about floors and digging giant holes in the ground, Elon Musk runs an electric car company. Late Sunday night, he tweeted the biggest news yet in Tesla’s short history. The Model 3, a more affordable Tesla, will roll off the assembly line on Friday. Last week, Musk teased that he would have news on Sunday, and just before midnight, he tweeted, “Model 3 passed all regulatory requirements for production two weeks ahead of schedule.